Oil separator (EN 858-1)

PIA GmbH tests vessels and plants in which gravity (class II) or coalescence (class I) is used to separate light liquids from wastewater. The nominal size and class of the separator are determined under test conditions.

 

Abscheiderklassen
ClassMaximum permissible content of residual oil in mg/lSeparation technology
I 5,0 coalescence
II 100,0 gravity

Grease separator (EN 1825-1)

PIA GmbH tests separator systems according to EN 1825. These systems are used to separate animal and vegetable greases and oils from wastewater by gravity without needing an external energy source.

The nominal size of the separator plants for grease is determined either by the rated value found in the standard (EN 1825 Table 2 - Main dimensions for grease separators) or by a test according to EN 1825-1 8.5.1. In the practical test, the content of hydrocarbons in the effluent of the specimen must not exceed 25 mg/l.

Rainwater treatment

As ground surfaces, particularly in cities, are being increasingly sealed off, the pollutant loads of rainwater flowing over these surfaces is steadily rising. To reduce these loads from the separation systems, the Ministry for Climate Protection, Environment, Agriculture, Conservation and Consumer Affairs (MKULNV) of North Rhine-Westphalia (NRW) has published the decree “Requirements for Rainfall Drainage in Separation Processes”.

The decentralised systems can be compared with the central plants according to the separation decree when the retention rating of fine filterable substances is greater than 50% and when the operational test results positively certify they can be compared with rain clarifiers.

Test stand for rainwater/Separator technology

Wastewater lifting plants

Test according to EN 12050

EN 12050-1:2001

  • Wastewater lifting plants for buildings and sites
  • Principles of construction and testing
  • 1: Lifting plants for wastewater containing faecal matter

EN 12050-2:2000

  • Wastewater lifting plants for buildings and sites
  • Principles of construction and testing
  • 2: Lifting plants for faecal-free wastewater

EN 12050-3:2000

  • Wastewater lifting plants for buildings and sites
  • Principles of construction and testing
  • 3: Lifting plants for wastewater containing faecal matter for limited applications

EN 12050-4:2000

  • Wastewater lifting plants for buildings and sites
  • Principles of construction and testing
  • 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter
Testing of hydraulic performance